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Commit 843f386c authored by Wen Zhang's avatar Wen Zhang Committed by Song Chun Fan
Browse files

[Bugfix]use walkFileTree to calucate apk size 

When using foreach on the stream of Files.walk, the FileTreeIterator may generate an UncheckedIOException, which can cause a system crash.

Bug:292486804
Test:
1.statsd_testdrive 524
2.adb install any apk
3.observe apks_size_bytes

Merged-In: I18852ced54ceeb63785033de3f1ab22a35ba1fc1
Change-Id: I0e223fc61184a51a4f5a71df54ba50137376df8e
parent 7039b4f7

services/core/java/com/android/server/pm/PackageMetrics.java

+24 −4
Original line number Diff line number Diff line
@@ -34,8 +34,11 @@ import java.io.File; 
import java.io.IOException;

import java.lang.annotation.Retention;

import java.lang.annotation.RetentionPolicy;

import java.nio.file.FileVisitResult;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.SimpleFileVisitor;

import java.nio.file.attribute.BasicFileAttributes;

import java.util.ArrayList;

import java.util.concurrent.atomic.AtomicLong;

import java.util.stream.Stream;
@@ -155,10 +158,27 @@ final class PackageMetrics { 
    private long getApksSize(File apkDir) {

        // TODO(b/249294752): also count apk sizes for failed installs

        final AtomicLong apksSize = new AtomicLong();

        try (Stream<Path> walkStream = Files.walk(apkDir.toPath())) {

            walkStream.filter(p -> p.toFile().isFile()

                    && ApkLiteParseUtils.isApkFile(p.toFile())).forEach(

                            f -> apksSize.addAndGet(f.toFile().length()));

        try {

            Files.walkFileTree(apkDir.toPath(), new SimpleFileVisitor<>() {

                @Override

                public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs)

                        throws IOException {

                    if (dir.equals(apkDir.toPath())) {

                        return FileVisitResult.CONTINUE;

                    } else {

                        return FileVisitResult.SKIP_SUBTREE;

                    }

                }



                @Override

                public FileVisitResult visitFile(Path file, BasicFileAttributes attrs)

                        throws IOException {

                    if (file.toFile().isFile() && ApkLiteParseUtils.isApkFile(file.toFile())) {

                        apksSize.addAndGet(file.toFile().length());

                    }

                    return FileVisitResult.CONTINUE;

                }

            });

        } catch (IOException e) {

            // ignore

        }